electrical engineering MCQs – Page 102

Practise multiple-choice questions from electrical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

electrical engineering Mcqs

1. economics of power generation 2. analog electronics 3. solid state switching circuits 4. parallel circuits 5. switchgear and protection 6. op amp circuits 7. transistor audio power amplifiers 8. electrostatics 9. heating and welding 10. multi stage transistor amplifiers 11. passive filters 12. network theorems 13. regulated d c power supply 14. a c fundamentals circuits and circuit theory 15. electromagnetic induction 16. power electronics 17. magnetism and electromagnetism 18. transformers 19. modulation and demodulation 20. d c generators 21. semiconductor theory 22. single phase induction motors 23. semiconductor diode 24. hybrid parameters 25. digital electronics 26. oscillators 27. earthing or grounding 28. single stage transistor amplifiers 29. d c motors 30. transistor biasing 31. amplifiers with negative feedback 32. basic electrical 33. electronic instruments 34. synchronous motors 35. field effect transistors fet 36. magnetic circuit 37. control systems 38. industrial drives 39. power generation 40. series parallel circuits 41. transistor tuned amplifiers 42. electrical engineering materials 43. rectifiers and converters 44. integrated circuits 45. scr silicon controlled rectifiers 46. cables 47. polyphase induction motors 48. measurement and instrumentation 49. transistors 50. electrical machine design 51. electrolysis and storage of batteries 52. electric traction 53. transmission and distribution

2021. H.R.C. fuse, as compared to a rewirable fuse, has_________________?
0

A. high rupturing capacity

B. high speed of operation

C. all of the above

D. no ageing effect

2022. The delay fuses are used for the protection of ___________?
0

A. light circuits

B. motors

C. power outlet circuits

D. fluorescent lamps

2023. Distance relays are generally_____________?
0

A. reactance relays

B. split-phase relays

C. none of the above

D. impedance relays

2024. Which of the following are the applications of D.C. system ?
0

A. Arc lamps for search lights

B. Battery charging work

C. All of the above

D. Arc welding

E. Electrolytic and electro-chemical processes

2025. Which of the following metals is generally manufactured by electrolysis process ?
0

A. Load

B. Zinc

C. None of the above

D. Aluminium

E. Copper

2026. When a rectifier is loaded which of the following voltage drops take place ?
0

A. Voltage drop in transformer reactance

B. All of the above

C. Arc voltage drop

D. Voltage drop in resistance of transformer and smoothing chokes

2027. transmission line has reflection coefficient as one?
0

A. Open circuit

B. None of the above

C. Long

D. Short-circuit

2028. Glass rectifiers are usually made into units capable of D.C. output (maximum continuous rating) of _____________?
0

A. 200 A at 200 V

B. 400 A at 400 V

C. 100 A at 100 V

D. 500 A at 500 V

E. 300 A at 300 V

2029. The change of cross-sectional area of conductor in magnetic field will affect______________?
0

A. reluctance of conductor

B. resistance of conductor

C. A. and B. both in the same way

D. none of the above

2030. An isolator is installed_____________?
0

A. to operate the relay of circuit breaker

B. as a substitute for circuit breaker

C. always independent of the position of circuit breaker

D. generally on both sides of a circuit breaker

2031. In the above circuit the current ix is___________?
0

A. 0.2A

B. 0.5A

C. 1/12A

D. 0.6A

2032. The closed-loop voltage gain of an inverting amplifier equal to______________?
0

A. The input resistance

B. The open-loop voltage gain

C. The ratio of the input resistance to feedback resistance

D. The feedback resistance divided by the input resistance

2033. The voltage appearing across the contacts after opening of the circuit breaker is called__________voltage
0

A. operating

B. arc

C. recovery

D. surge

E. none of the above

2034. How many op-amps are required to implement this equation Vo = V1?
0

A. 4

B. 3

C. 1

D. 2

2035. When a wave propagates on a transmission line, it suffers reflection several times at_____________?
0

A. tapping

B. sending end

C. all of the above

D. load end

E. sending and other end

2036. Ferrites are a sub-group of_______________?
0

A. ferro-magnetic materials

B. non-magnetic materials

C. paramagnetic materials

D. ferri-magnetic materials

2037. The inductive interference between power and communication line can be minimized by__________?
0

A. transposition of the power line

B. transposition of the communication line

C. both (A) and (B)

D. increasing the distance between the conductors

2038. If a copper disc is rotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity?
0

A. equal to that of disc and in the opposite direction

B. less than that of disc and in the same direction

C. equal to that of disc and in the same direction

D. less than that of disc but in opposite direction

2039. The ground wire should not be smaller than No _________ copper
0

A. 10

B. 6

C. 2

D. 4

2040. The short circuit in any winding of the transformer is the result of_______________?
0

A. insulation failure

B. mechanical vibration

C. impulse voltage

D. loose connection

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